Apparatus for purifying water.



PATBNTED AUG. 4, 1908;

2 SHEETS-SHEET 2.l

w v s J7 VZW H RESBRT.

H. APPARATUS FOR PURIPYING WATER.

No. 895,193.Y

wmvessfs:

new and useful Improvements in A l UNITED 'sT'ArEs PATENT onirica.

HANs REISERT, or COLOGNE, GniniANv, AssreNoR rro HANS RErsEnr COMPANY, ACORPORATION or GERMANY.

To all whom 'it may concern:

Be it known that I, HANS REIsER'r, a citizen of the Empire of Germany,and a resident of Cologne, Germany, have invented certain aratus forPurifying-raten of which theoillowing is a specification.

My invention relates to water purifying apparatus, and in`particula1 towater purifying apparatus comprising one or more filterbeds, with meansfor regulating the discharge of the water from one or more of the i'filter-beds, and with means for quickly and effectively washing out thelter-bed or beds. One object of my invention is to provide a filter-bedwith a reservoir suitably located with relation to filter-bed, saidreservoir being adapted to receive filtered water during the filteringoperation, and to provide means for quickly and effectively forcing thewater from the reservois.` through the filter-bed, through passages ofample cross-section, to permit the rapid washing out of the filtered andthe distribution of the wash water over one side of and through thefilter-bed, without interrupting, for a long time, the filteringoperation.

Another object of my invention is to provide a regulating means forcontrolling the flow of water through the filter-bed, said regulatingmeans comprising a chamberthat receives the filtered water, togetherwith a float in the chamber and a regulating valve suitably located in adischarge passage from the filter-bed, whereby as the back pressureproduced by the filter increases, tie back pressure through thedischarge passage decreases.

With the above and other objects in view, my inventionconsists in theparts, improvements and combinations more particularly set out in theclaims.

Referring now to the drawings winch are attached to this specificationand form a part hereof: Figure 1 illustrates asectional view of one formof my invention, the sections being taken on the line A-A of F ig. 5;Fig. 2 illustrates a sectional viewgon the line BB of Fig. 5; Fig. 3 isa sectional view on the line C-C of Fig. 5; Fig. 4 is a sectional viewon the line D-D of Fig: 5; Fig. 5 is a plan view of part of thefiltering apparatus.

Specification of Letters Patent.

Apiaicacion sieri may 12, 190e. serial No. 316,428.

APPARATUS Non. renferme WATER.

Patented A1ig 4, 190s.

Fig. 6 illustrates another embodiment of my invention, in which adischarge -pipe for the waste water is located within the filter-bed;and Fig. 7 illustrates a top plan view of Fig. 6.

In Fig. 1, the raw water t0 be purified is conveyed to the filtersthrough a channel 1. I have shown a battery bf'filters supplied from thechannel 1, a valve-gate 2 controlled by the adjustable hand-screw 8being used to permit the water to flow from the channel 1 to thefilter-bed 4. A gate 5 allows water to pass from the channel 1 to ,thefilter-bed 6.

\'I`he filter-beds 4 and 6 are separatedfrom -each other by means of thewalls 7 and 8. In the same way'the channel 9 allows water to enter thefilter-beds 10 and 11 through the gates 13 and 14. The filter-beds 10and 11 are separated by the walls 15 and 16. The water, after passingthrough the filter-bed, descends to the reservoir 17 located beneath thefiltenbed. This reservoir is separated from the filter-bed by means of apartition 18. As shown in Fig. 1, the partition is made u of a pluralityof bloc-ks suitably connecte together; one or more tubes 19 pass throughthe partition and form the means of ermitting the water to pass from thefiltered to the reservoir or in the reverse direction during the washout operation, as may be desired. The water leaves each filter-bedthrough a discharge passage 20, and passes into a chamber 21, and thenthrough an outlet 22, controlled by a stop-cock 23, into a sluice 24.

I have provided suitable means for regulating the flow of water throughthe filterbed, to compensate for the varying back pressure offered bytl'iefilter-bed, as the filter clogs. In the best embodiment of myinvention I make use of a valve 25, pivoted' in the passage 20, so thatthe movement of the valve will more or less open the passage. I locatein the chamber 21 a float 26, which takes its position on the waterlevel in the chamber and rises and falls as the water level rises andfalls. Suitable means, such as a connecting-rod 27 and a bell-crank 28,are provided for connecting the" float to the valve. I also make use ofa pointer 29 and scale 30, connected to the float by the lever 31 androd 32, to indicate. the position of the float. As the lter becomesclogged, the

water levelin the chamber 2 1 sinks, the Heat descends, the valve opens,and the pointer moves away from its zero ositlon.A The resistanceoffered to the disc arge of the Water 1 operation.

thereby decreases as the resistance or back pressure due to the filterincreases.l

- When the pointer reaches the extreme end 'of the scale, this indicatesthat it is time to Wash out the filter. This I accomplishby thefollowing means: The reservoir 17 contains enough water to wash out thefilter quickiy and effectively in substantially one The tubes 19 havesufficient and ample cross-section to permit the quick and effectiveflow of wster 1n the reverse'di'- rection through the filterbed.Suitable v means are provided to force the wash'water through the tubes19 which means, in the form illustrated in the drawings, are independentof the pipe 31* which supplies raw water to the filter bed. I prefer forthis purpose to make use of a pipe 31, controlled by a valve 32", whichsupplies compressed air from the air compressor 500 to the reservoir 17.As soon as the valve 32aL is opened, the compressed air rushing into thereservoir 17 at. or near the top and below the partition 18 will foncethe water in the reservoir 17 up through the tubes 19 and out overthetop of the filter.

In the form of my invention shown in Figs. 6 and 7, I make use of aclosed filter-bed operating under pressure, as distinguished from the oen filter-bed shown in Figs. 1 and 5. The ter chamber 33* has a cover33b under which air is compressed. Raw water is supplied to thefilter-bed by means of the pipe 33, controlled by valve 34. Thefilterbed 35 consisting of sand or other suitable materiel rests uponthe foundation 37 of coarse stones, the bed being supported by theperforated Wall 3S- Brackets 39 carry the well. The water passes throughthe `ter-bed, and the filtered water enters the reservoir` 40, passingtherefrom by the pipe or discharge passage 41, controlled by the valve42. The partition wall 43 separates the reservoir from the filter-bed. Alarge tuhe 44 passes through the` partition and is secured thereto bythebrackets 45.

-In order to wash out the filter-bed in the best embodiment of this formof my invention, I make use of a large discharge tube 46, which receivesthe discharged wash-out water and carries it away bythe pipe 47,controlled by a valve regulated by the hand-v fwheel 4S- Flsnges 49guide the water to the tube 46- A reservoir 50 is located near thefilter-bed and supplied .vith air `through the pipe 51. This air iscompressed 1n the reservoir b v means of a hydraulic column 52, which issupplied to the reservoir bythe pipe 53, controlled by the vslve 54. Thewater may be discharged from the reservoir 50,

when it is desired to compress a fresh lot of air,'by the pipe 55,controlled by valve 56.

After the air 1s 'compressed in the reservoir 50, 1t may be admitted tothe top ofl thereservoir 40 and below the partition 43 by a pipe e 57,controlled by valve 58, which enters t reservoir 40 at t-he point 59.The valve 58 'is closed during the' operation of compressing the air inthe reservoir 50.

It will'be observed that the pi e 57 and the reservoir 50 constitute ameans or supplying compressed air to the reservoir 40, which areindependent ofthe means for supplying water to the filter bed, or, inother words,

that the means for su plying air and the water tobe purified to tieapparatus are inde endent of each other. f Vhen 1t 1s desiredto wash outthe filter the valve 42 is closed, the valve 48 opened,

as well asthe valve 58. The air rushes through the pipe 57, presses u onthe top of the water in the reservoir 40, t e wash water being forcedthrough tlie-passage 44 upwardly through the filter-bed, having beenevenly distributed thereunder, and 1 s discharged through the tube 46and the pipe 47.

The quantity of water stored in the reservoir 40 is usually sufficientto wash out the filterbed in one operation.

Having thus described my invention, it will be evident that manymodifications of the apparatus by means of which my invention is carriedinto effect, may be made without departing from the principles thereof.

What I claim and desire to secure by Letters-Fatent is A 1. In a waterurify'un7 a paratus, the combination of a filter, a iscliarge passagelfor the filtered water, a reservoir arrange between said -filter andsaid passa e and adapted to be supplied with urifie water during thefiltering operation y the flow of water in* one` direction through thefilter, means connecting said reservoir and filter, said means being ofample cross-section to permitthe rapid supply of water from thereservoir to the filter in the reverse direction -during the wash outoperation, and means for rapidly forcing the water contained in saidreservoir through said filter bed. Y J- u urifying apparatus, the 115 2.In a water combination of afi ter-bed, a t ischarge passage for thefiltered water, a reservoir beneath said filter-bed and arranged betweensaid filter bed and said passage, said reservoir being of a sufficientcapacity to contain the amount ofwater requisite to wash out saidfilter-bed, said reservoir being arrangled and adapted to be suppliedwith urifie( water during the filtering operation y the flow of water inone direction through the filter-bed,

means connecting seid reservoir and filterbed, said means being if am lecross-section to permit the rapid su ply o water from the reservoir tothe filter-Ibed in the reverse di rection'during the wash out operation,and

means for ra idly forcing the water con- `tt;)ai(iied in sai( reservoirthrough said filter 3. In a wat" uriiy-ingwa paratus, the combination ofa filter-bed, a ischarge passage for filtered water, a reservoirarranged between said discharge passage and said filter bed beneathsaidfilter-bed, said reservoir being of a suflicient capacity tocontainl the amount of water requisite to wash out said filter-bed, andsaid reservoir being adapted to be supplied with urified water duringthe filtering operation liy the flew of water in one direct-ion throughthe filter-bed, one or more short tubes between said reservoir and saidfilter-bed, said tube or tubes havinvr ample cross-section so as topermit the rapid supply of water from the reservoir to the filter-bed inthe reverse direction.

4. In a water purifying apparatus, the

combination of a filter-be a reservoir be-` neath said filter-bed, saidreservoir being of a sufficient capacity to contain the amount of waterrequisite to wash out said filter-bed, and said reservoir being adaptedto be supplied with purified water during the filtering operation by theflow of water in one direction through the filter-bed, a partitionbetween said filter-bed and said reservoir, one or more tubes assingthrough said partition, said tube or tubes having ample cross-section s0`as to permit the rapid supply of water from the reservoir to thefilter-bed in the reverse direction.

5. In a water iurifyine apparatus, the combination of a iilter-bed,means for suplyinfv water to and delivering it from said iiltered, areservoir for puried water beneath said filter-bed, said reservoir beingof sufficient capa-city to contain enough wat-er to wash out saidfilter-bed, means'connect-` ing said reservoir and filter-bed, saidmeans bein of ample cross-section to permit the rapi( supply of waterfrom the reservoir to the filter-bed, and means for supplying pneumaticpressure to said reservoir, so as to force the wash water through thefilter-bed.

`6. In a water urif ing a paratus, the combination of a fiqter-bed, a Lischarge passage for the filtered water, means for supplyinor water tobe filtered in one direction to said filter-bed, a reservoir beneathsaid filterbed arranged between said discharge passage and said filterbed, said reservoir being adapt-Y ed to contain the water to wash outsaid i'ilter-bed, and being arranged and adapted to be supplied withpurified water by the filtering operation, means leadingl from saidreservoir to said filter-bed to carry wash water in a reverse directionthrough said filter-bed, said means including a passage-way of largecross-section located between said reservoir and said filter-bed, andmeans for forcing the charge of wash water from said 65 reservoirthrough said filter-bed and through said passage, said means beingindependentof the means for supplying the water to be filtered to thefilter-bed.

7. In awater urifyingap aratus,t:e combination of a fi ter-bed, adischarge paszage for said filter bed, a reservoir beneath saidfilter-bed 'arranged between said discharge assage and said filter bed,said reservoir eiiig of a sufficient capacity to contain enough water towash out said filter-bed, means leading from said reservoir tosaidfilter-bed to cariwash water in a reverse direction throug saidfilter-bed, said means including a passageway of large cross-sectionlocated between said reservoir and said filterbed, Fand means forsupplying pneumatic pressure to said reservoir to force saidwash waterfrom said reservoir through said filterbed and through said passage. i

8. In awater urifying apparatus, the combination of a fi ter-bed, areservoir beneath said filter-bed, said reservoir bein of a sufficientcapacity to contain enougi water to wash out said filter-bed, meansleading from said reservoir to said filter-bed to curry wash water in areverse direction through said filter-bed, said means'including apassageway of large cross-sectioiilocatcdbetween said reservoir and saidfilter-bed, means for supplyingcompressed air, a pi e between said meansand sai reservoir, an a valve in said pipe.

9. Inawater urif iiivapparatus,tlie combination of a ltereri, a passaefor discharging filtered water from said fi ter-bed, a valve in saidpassage, a chamber for receiving the discharged water, a floatvon thewater` line in said chamber adapted to rise and fall in said chamber asthe water level in said chamber varies, the arts being so proportionedand adjusted t at as the resistance to the flow of water through thefilter increases, the resistance offered by the valve to the dischargeof water from the filter-bed decreases.

10. In a water purifying apparatus, the combination of a filter-bed, apassage for discharging filtered water from said filter-bed, a valve insaid passage, a chamber for receivin the discharged water, an outletfrom sai chamber, a float on the water line in said chamber ada ted torise and fall in said chamber as r e water level in said chamber varies,connections between said float and said valve, and a pointer and scaleconnected to said float.

l1. In a water purif combination of a plura ity of ilter-beds, a passagefor each of said filter-beds for'discharging filtered water, a valve ineach passage, a chamber for each filter-bed for receiving the dischargedwater, an outlet from each chamber, a float on the water line in eachchamber adapted to rise and fall in said chamber as the water level insaid chamber varies, and connections between each float and thecorresponding valve, the parts being v ing 'ap aratus, the 1720combination of a l so proportioned and adgusted that as'the resistanceto the flow o water through any ilterbed increases, the `resistanceoffered by the valve .to the discharge of Water from the filter-beddecreases;

12. In e. water uriying a paratus the ter bed, a charge passage forsaid'ilter bed, a reservoir beneath said filter bed arranged betweensaid discharge passages and said filter bed, saidreservolr being ofsufcient capacity to contain the amount of water requisite to Wash outseid filter bed and said reservoir being ar rangedx to be supplied withuried Water 15 dnringthe'iilteiing operation y the flow of Wet-er in onedirection through the )filter bed,

means connecting said 4reservoir and i'ilter bed, said means being orample Grossi-section to permit the rsi-nid sunply or Water from thereservoir to the iiter ed in the reversed direction during the wesh outoperation and means for discharging the Wash Water from the `filter bed,seid met means being of ample Gro-section to permit the ra id discharge,o wash Water from the iilter bed).

` 13'. In e Wat-er purifying a paratus, the combination of e filter bed,a discharge passage for the ltererl Water, a reservoir adapted tocontain a storege'sunply of Wash water i 3Ui end errenffed between aaidischarge passage and said inter bed, paf/visages of ample crosseeetionbetween the reservoir 'end' the filter bed to permit the rapid supply ofwater from two subscribingwitnesses.

the reservoir to the filter bed the Wash u' out operation, ineens fordistributing the wesh Water through one side of the filter bed.. andIneens for discharging thewash'water from the filter bed, said lastnamed means bein i .of ample cross-section to permit the f rapidischarge of Water from thelter bed.

14. In a Water puriyi apparatus, the combination of a horizontefilter-bed, e discharge passage for the filtered water, a reservoiradapted to contain a storage snp' ly of bed, the said lastnamed Ineensbeing of ample cross-section to permit the discharge of water from thelter-bed. In testimony whereof, .vi-have signed my neme to thisspecication, in the preeence of HANS REISERT. Witnesses :I i

Louis VANDORY, EUGEN KREUTZBERG.

